Modelling the effect of temperature and water activity of Aspergillus flavus isolates from corn

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dc.contributor.authorAstoreca, A.
dc.contributor.authorVaamonde, G.
dc.contributor.authorDalcero, A.
dc.contributor.authorRamos Girona, Antonio J.
dc.contributor.authorMarín Sillué, Sònia
dc.date.accessioned2016-11-22T12:00:11Z
dc.date.embargoEndDate2025-01-01
dc.date.issued2011
dc.description.abstractThe aim of this study was to model the effects of temperature (10–40 °C) and aw (0.80–0.98), in two media (Czapek yeast agar: CYA; corn extract medium: CEM) on the growth rates and growth boundaries (growth–no growth interface) of three strains of A. flavus isolated from corn in Argentina. Both kinetic and probability models were applied to colony growth data. The growth rates obtained in CYA were significantly (p < 0.05) greater than those obtained in CEM medium. No significant differences (p < 0.05) were observed among the three isolates. The growth rate data showed a good fit to the Rosso cardinal models combined with the gamma-concept with R2 = 0.98–0.99 and RMSE = 0.60–0.78, depending on media and isolates. The probability model allowed prediction of safe storage (p of growth < 0.01) for one month for moist maize (e.g. 0.90 aw) provided temperature is under 15 °C, or for dry maize (e.g. 0.80 aw) provided temperature is under 27 °C. Storage at < 0.77 aw would be safe regardless of the storage temperature. Probability models allow evaluation of the risk of fungal contamination in the process of storage, so the results obtained in this study may be useful for application in systems of food safety management.ca_ES
dc.description.sponsorshipThe authors are grateful to “Latinamerican Science and Technology Development Programme” (CYTED) and to “Consejo Nacional de Investigaciones Científicas y Técnicas” (CONICET) for the financial support. The authors are grateful to the European Union (MYCORED KBBE-2007-2-5-05 project), and Spanish government (AGL2010-22182-C04-04 project) for the financial support.ca_ES
dc.identifier.doihttps://doi.org/10.1016/j.ijfoodmicro.2012.03.002
dc.identifier.idgrec017811
dc.identifier.issn0168-1605
dc.identifier.urihttp://hdl.handle.net/10459.1/58599
dc.language.isoengca_ES
dc.publisherElsevierca_ES
dc.relationeu-repo/grantAgreement/MICINN//AGL2010-22182-C04-04/ES/CAMBIO CLIMATICO Y NUEVOS HABITOS ALIMENTARIOS: NUEVOS ESCENARIOS CON IMPACTO POTENCIAL SOBRE EL RIESGO DE MICOTOXINAS EN ESPAÑA/
dc.relation.isformatofReproducció del document publicat a https://doi.org/10.1016/j.ijfoodmicro.2012.03.002ca_ES
dc.relation.ispartofInternational Journal of Food Microbiology, 2012, vol. 156, núm. 1, p. 60-67ca_ES
dc.relation.projectIDinfo:eu-repo/grantAgreement/EC/FP7/222690
dc.rights(c) Elsevier B.V., 2012ca_ES
dc.rights.accessRightsinfo:eu-repo/semantics/restrictedAccessca_ES
dc.subjectAspergillus flavusca_ES
dc.subjectKinetic modelca_ES
dc.subjectProbability modelca_ES
dc.subjectTemperatureca_ES
dc.titleModelling the effect of temperature and water activity of Aspergillus flavus isolates from cornca_ES
dc.typearticleca_ES
dc.type.versionpublishedVersionca_ES
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